CF油田火山热液流体活动及其对碳酸盐岩储层的改造作用
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  • 英文篇名:Reformation of the volcanic hydrothermal fluid activities to the carbonate reservoir in CF Oilfield
  • 作者:金小燕 ; 刘晓健 ; 郝轶 ; 王军 ; 王富民
  • 英文作者:JIN Xiaoyan;LIU Xiaojian;HAO Yiwei;WANG Jun;WANG Fumin;CNOOC Tianjin Company;
  • 关键词:CF油田 ; 古生界 ; 碳酸盐岩储层 ; 深部热液流体 ; 储层改造
  • 英文关键词:CF Oilfield;;Paleozoic;;carbonate reservoirs;;deep hydrothermal fluid;;reservoir reformation
  • 中文刊名:DQSK
  • 英文刊名:Petroleum Geology & Oilfield Development in Daqing
  • 机构:中海石油(中国)有限公司天津分公司;
  • 出版日期:2019-02-01
  • 出版单位:大庆石油地质与开发
  • 年:2019
  • 期:v.38;No.191
  • 基金:国家科技重大专项“渤海海域勘探新领域及关键技术研究”(2016ZX05024003)
  • 语种:中文;
  • 页:DQSK201901006
  • 页数:9
  • CN:01
  • ISSN:23-1286/TE
  • 分类号:45-53
摘要
为探讨CF油田热液活动对古生界碳酸盐岩储层的影响,对岩心、薄片、扫描电镜、阴极发光、碳氧锶同位素、流体包裹体等进行了综合分析。研究认为:碳酸盐岩储层中存在典型的热褪色、细密不规则诱导缝,发育鞍形白云石、硅质结核、自生石英等典型热液矿物;受热液影响的方解石阴极发光下发亮橘黄色光、δ18O值异常低、87Sr/86Sr值异常高,盐水包裹体均一温度明显高于地层温度;富含Mg~(2+)的酸性岩浆热液流体沿断裂涌入地层,促使围岩发生白云石化作用,产生大量的晶间孔,同时溶蚀碳酸盐岩,形成大量的溶蚀孔隙;受热液流体作用影响形成的诱导缝可进一步沟通储集空间,改善了储层的渗透性,提升了碳酸盐岩储层储集性能。
        In order to find out the influence of the hydrothermal activities on Paleozoic carbonate reservoir in CF Oilfield,the comprehensive analyses on the core,thin section,scanning electron microscope,cathodeluminescence,carbon-oxygen-strontium isotopes,fluid inclusion and so on were engaged. The study shows that there are typical thermal fading,fine and irregular induced fractures in the carbonate reservoirs,and the typical hydrothermal minerals such as saddle dolomite,siliceous nodules,authigenic quartz and so forth have been found; under the influence of the hydrothermal fluid,the calcite glowing orange yellow,low-value δ18O,high-content87Sr/86 Sr and obviously high homogenized temperature of the brine inclusions than the temperature of the surrounding rock; Mg2+-enriched acidic magmatic hydrothermal fluids flow into the formations along the faults and cause dolomitization of the surrounding rocks,thus result in a large number of intergranular pores,while dissolve the carbonate rocks and form a large number of dissolved pores; the induced fractures constructed by the hydrothermal fluid can further communicate the reservoir space and greatly improve the reservoir permeability,finally the accumulating performance of the carbonate reservoir has been enhanced.
引文
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